package com.gome.ZooKeeper;

import java.util.Arrays;
import java.util.List;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.ZooDefs.Ids;

/**
 * @author ruodao
 * @since 1.0
 * 2010-2-18 下午09:03:21
 */
public class ZooKeeperOperator extends AbstractZooKeeper {
	/**
	 * 创建持久态的znode,比支持多层创建.比如在创建/parent/child的情况下,无/parent.无法通过.
	 * @param path eg:  /parent/child1
	 * @param data
	 * @throws InterruptedException 
	 * @throws KeeperException 
	 */
	public void create(String path,byte[] data) throws KeeperException, InterruptedException{
		this.zooKeeper.create(path, data, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT/*此处创建的为持久态的节点,可为瞬态*/);
	}
	
	
	/**
	 * 获取节点的孩子信息
	 * @param path
	 * @throws KeeperException
	 * @throws InterruptedException
	 */
	public void getChild(String path) throws KeeperException, InterruptedException{
		try {
			List<String> children = this.zooKeeper.getChildren(path, false);
			if (children.isEmpty()) {
				System.out.printf("没有节点在%s中.", path);
				return;
			}else{
				System.out.printf("节点%s中存在的节点:\n", path);
				for(String child: children){
					System.out.println(child);
				}
			}
		} catch (KeeperException.NoNodeException e) {
			System.out.printf("%s节点不存在.", path);
			throw e;
		}
	}

	public byte[] getData(String path) throws KeeperException, InterruptedException {
		return	this.zooKeeper.getData(path, false,null);
	}
}
